[TriLUG] NFS client connections and stats

[Ron Kelley via TriLUG]

Thanks for the reply.  After more searching, I found a tool called "nfswatch" which does exactly what I need.  It provides a list of clients connected to an NFS server with the associated details per client.  The other tools listed below are meant to run on NFS clients (kinda odd since you really need this type of data on the server side).

By default, nfswatch spits out a ton of garbage data which makes the terminal go crazy.  Per this url (https://wiki.fysik.dtu.dk/it/NFSwatch), the best way to run it is to redirect stdout to /dev/null.

nfswatch -allif -clients -usage 2>/dev/null


Hope this helps someone.



-Ron






On 02/28/2018 12:15 PM, Mike Viscount wrote:
> 
> Without checking the google ... I believe that nfsiostat is a client side tool and hence the message you're getting.
> 
> Try iostat on the server ... may be an NFS option ... -n maybe ... man iostat will tell you.
> 
> To see who is mounting the filesystems (NFS clients) ... the showmount command on the nfs server should give you that info.  Again, man is your friend :-)
> 
> Next likely question ... on the NFS server how can I monitor the load being put on it by the nfs clients ... good question ... Dear Mr. Google, How can I .... :-)
> 
> nfsstat should tell you NFS server stats but not sure if that can be used to give client request stats for load determination.
> 
> Once you know the clients you can do some nfsiostat commands on those to see who is pounding hardest, issue commands remotely via ssh, but ideally checking the request load on the server would be better/best.
> 
> To busy w/ work right now to dig in and don't know off the top of my head but hope the above is helpful.
> 
> Mike
> 
> 
> On Wed, Feb 28, 2018 at 10:03 AM, Ron Kelley via TriLUG <trilug at trilug.org <mailto:trilug at trilug.org>> wrote:
> 
>     Greetings all,
> 
>     I have a CentOS 6 server running NFSv3 with a number of exported directories.  Recently, one of the NFS clients started hammering the server, but I can't track down the client.  I have done a ton of googling, and the best tools I can find are "nfsiostat" and "nfsstat".  The best tool seems to be "nfsiostat", but I get the message "No NFS mount points were found".  The other tool just spits out some stats but nothing that links a client to an NFS mounted directory.
> 
>     Hoping someone might have a solution to show which NFS client is consuming I/O.
> 
>     Thanks.
> 
>     -Ron
>     -- 
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